Example usage for javax.crypto Cipher getInstance

Introduction

In this page you can find the example usage for javax.crypto Cipher getInstance.

Prototype

public static final Cipher getInstance(String transformation)
        throws NoSuchAlgorithmException, NoSuchPaddingException

Source Link

Document

Returns a Cipher object that implements the specified transformation.

Usage

From source file:com.web.mavenproject6.utility.EncryptionUtil.java

public String decrypt(byte[] input) throws GeneralSecurityException, NoSuchPaddingException {
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec);
    return new String(cipher.doFinal(input));
}

From source file:com.alta189.deskbin.util.DesEncrypter.java

public DesEncrypter(SecretKey key) {
    try {/*from  w w  w  .  java 2 s  .  c  om*/
        ecipher = Cipher.getInstance("DES");
        dcipher = Cipher.getInstance("DES");
        ecipher.init(Cipher.ENCRYPT_MODE, key);
        dcipher.init(Cipher.DECRYPT_MODE, key);

    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    }
}

From source file:com.jwt.security.auth.cryptographics.Crypto.java

public Crypto() {
    try {/*from   w w  w . j a  v  a  2  s. co  m*/
        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
        throw fail(e);
    }
}

From source file:com.example.license.DESUtil.java

/**
 * ?/* www .j  a  v  a  2 s. c  om*/
 * 
 * @param data
 *            ?
 * @param key
 *            
 * @return ??
 */
public static String encrypt(String data, String key) throws Exception {
    Key deskey = keyGenerator(key);
    // Cipher??
    Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    SecureRandom random = new SecureRandom();
    // ?Cipher?
    cipher.init(Cipher.ENCRYPT_MODE, deskey, random);
    byte[] results = cipher.doFinal(data.getBytes("UTF-8"));
    // http://tripledes.online-domain-tools.com/??
    for (int i = 0; i < results.length; i++) {
        System.out.print(results[i] + " ");
    }
    System.out.println();
    // ??Base64?
    return Base64.encodeBase64String(results);
}

From source file:ch.helmchen.camlapse.user.control.Encryption.java

public static String decrypt(String aBase64String) throws GeneralSecurityException, IOException {
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
    Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
    pbeCipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
    return new String(pbeCipher.doFinal(base64Decode(aBase64String)));
}

From source file:com.imaginary.home.cloud.Configuration.java

static public @Nonnull String encrypt(@Nonnull String keySalt, @Nonnull String value) {
    try {/*from  w w  w  .j  a v  a  2 s. co m*/
        SecretKeySpec spec = new SecretKeySpec(getConfiguration().getCustomSalt(keySalt), "AES");
        Cipher cipher = Cipher.getInstance("AES");

        cipher.init(Cipher.ENCRYPT_MODE, spec);

        byte[] raw = value.getBytes("utf-8");
        byte[] encrypted = cipher.doFinal(raw);
        byte[] b64 = Base64.encodeBase64(encrypted);
        return new String(b64, "utf-8");
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
private static String encryptStringImpl(Context context, final String plainText) {
    String encryptedText = plainText;
    try {/*from  w w  w  .j ava 2 s . c  o m*/
        final KeyStore keyStore = getKeyStore(context);

        PublicKey publicKey = keyStore.getCertificate(KEY_ALIAS).getPublicKey();

        String algorithm = ALGORITHM_OLD;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            algorithm = ALGORITHM;
        }
        Cipher cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        CipherOutputStream cipherOutputStream = new CipherOutputStream(outputStream, cipher);
        cipherOutputStream.write(plainText.getBytes("UTF-8"));
        cipherOutputStream.close();

        byte[] bytes = outputStream.toByteArray();
        encryptedText = Base64.encodeToString(bytes, Base64.DEFAULT);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return encryptedText;
}

From source file:aajavafx.Kripto.java

public String decrypt(String cipherText) throws Exception {
    Base64 decoder = new Base64();
    byte[] decodedBytes = org.apache.commons.codec.binary.Base64.decodeBase64(cipherText.getBytes());
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    SecretKeySpec key = new SecretKeySpec(encryptionKey.getBytes("UTF-8"), "AES");
    cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(IV.getBytes("UTF-8")));
    return new String(cipher.doFinal(decodedBytes), "UTF-8");
}

From source file:Main.java

/**
 * More flexible AES encrypt that doesn't encode
 *
 * @param key AES key typically 128, 192 or 256 bit
 * @param iv Initiation Vector/*from   w w w. j a  v a 2  s  . c  o  m*/
 * @param message in bytes (assumed it's already been decoded)
 * @return Encrypted cipher text (not encoded)
 * @throws GeneralSecurityException if something goes wrong during encryption
 */
public static byte[] encrypt(final SecretKeySpec key, final byte[] iv, final byte[] message)
        throws GeneralSecurityException {
    final Cipher cipher = Cipher.getInstance(AES_MODE);
    IvParameterSpec ivSpec = new IvParameterSpec(iv);
    cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
    byte[] cipherText = cipher.doFinal(message);

    log("cipherText", cipherText);

    return cipherText;
}

From source file:net.sf.hajdbc.codec.crypto.CipherCodec.java

/**
 * {@inheritDoc}// ww  w.j a v a2s  . c om
 * @see net.sf.hajdbc.codec.Codec#decode(java.lang.String)
 */
@Override
public String decode(String value) throws SQLException {
    try {
        Cipher cipher = Cipher.getInstance(this.key.getAlgorithm());

        cipher.init(Cipher.DECRYPT_MODE, this.key);

        return new String(cipher.doFinal(Base64.decodeBase64(value.getBytes())));
    } catch (GeneralSecurityException e) {
        throw new SQLException(e);
    }
}